I just watched the replay on Totally Na$car & Joe was not blocking. the tape they showed was from above & you could clearly see a lane on the bottom of the track.
It didn't really look like blocking to me either. He pulled up a lane to let Rusty to get by, and Gordon caught up as Rusty made teh pass. I think the announcer or press or whoever like making it a bigger story than it really is b/c Joe happens to be a teammate of Gordon.
Yep, No blocking there. The fact is that Jeff would have caught rusty whether or not the 25 was there. Jeff just had a better car and thats all there is too it.